Physics Exam Past Questions and Answers | JAMB, WAEC and NECO

Physics is the science that studies the nature and properties of matter and energy. It covers topics like motion, heat, light, sound, electricity, magnetism, and the structure of atoms.

• Question 1281: Calculate the work done in charging a capacitor of capacitance 20µF through a potential difference of 1000V. Options:
  A) 0.02 J
  B) 0.10 J
  C) 0.20 J
  D) 1.00 J
  E) 10.00 J
  Show Answer
  The correct answer is E .
• Question 1282: Calculate the heat energy lost when 10g of boiling water changes to ice at 0°C. [Specific latent heat of ice 336Jg^-1 . Specific heat capacity of water 4.2Jg^-1 K^-1] Options:
  A) 840J
  B) 3360J
  C) 3420J
  D) 4200J
  E) 7560J
  Show Answer
  The correct answer is E .
• Question 1283: blowing air over a liquid aids evaporation by Options:
  A) increasing its surface area
  B) decreasing its vapour pressure
  C) increasing its temperature
  D) decreasing its density
  Show Answer
  The correct answer is A .
• Question 1284:

  The number of holes in an intrinsic semiconductor

  Options:
  A) is not equal to the number of free electrons
  B) is greater than the number of free electrons
  C) is equal to the number of free electrons
  D) is less than the number of free electrons
  Show Answer
  The correct answer is C .
• Question 1285:

  The density of 400cm³ of palm oil was 0.9gcm^-3 before frying. If the density of the oil was 0.6gcm^-3 after frying, assuming no loss of oil due to spilling, its new volume was?

  Options:
  A) 1360cm${}^3$
  B) 600cm${}^3$
  C) 240cm${}^3$
  D) 8000m${}^3$
  Show Answer
  The correct answer is B .
• Question 1286: an object 1cm high placed on the axis 15cm from a converging lens forms an image 30cm from the lens. The size of the image is Options:
  A) 0.5cm
  B) 1.5cm
  C) 3cm
  D) 2.5m
  E) 2cm
  Show Answer
  The correct answer is E .
• Question 1287: I Electrical potential, II Torque, III Kinetic Energy, IV Momentum. Which of the quantities listed are vectors? Options:
  A) II and IV
  B) I and II
  C) I and III
  D) II and III
  Show Answer
  The correct answer is A .
• Question 1288:

  A source of sound produces waves in air of wavelength1.65m. If the speed of soundin air is 330ms${}^{-1}$, the period of vibration in air is?

  Options:
  A) 200
  B) 0.005
  C) 0.5
  D) 0.02
  Show Answer
  The correct answer is B .
• Question 1289: The current in a reverse-biased junction is due to? Options:
  A) minority carriers
  B) electrons
  C) majority carriers
  D) holes
  Show Answer
  The correct answer is A .
• Question 1290: A body of mass 2kg moving vertically upwards has its velocity increased uniformly from 10ms^-1 to 40ms^-1 in 4s. Neglecting air resistance, calculate the upward vertical force acting on the body.[g = 10 ms^-1] Options:
  A) 15N
  B) 20N
  C) 35N
  D) 45N
  Show Answer
  The correct answer is C .